Valve for internal-combustion engines.



L. J. R. HOLST. VALVE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED FEB.I3,1912.

Patented Feb. 4, 1913.

B3 4 SHEETS SHEET 1.

4 TTORNEY L. J. R. HOLST.

VALVE FOR INTERNAL COMBUSTION ENGINES.

'APPLICATION FILED 1113.13, 1912. 1,052,339 Patented Feb. 4, 1913.

4SHEETS-SHEET z.

. INVENTOR WITNESSES @Wpzzd BY 7 WWW/b24222 L. J. R. HOLST. VALVE FORINTERNAL COMBUSTION ENGINES.

APPLICATION FILED FEBJS. 1912.

Patented Feb. 4, 1913.

4 SHEETSSHEET 3.

FIG. 5

wrrNEssEs A TTORNE Y L. J. R. HOL'ST. VALVE FOR INTERNAL COMBUSTIONENGINES.

APPLIOATION FILED FEB.13.1912.

Patented Feb. 4, 1913 -4 SHEETS-SHEET 4.

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/////I////// I 7/////1Z////7//// II I a. W 8 8 a b 5 Z 5 W 7%. z MZ ATTORNE Y UNITED STATES PATENT OFFICE.

LODEWYK JAN BUTGEB HOLST, OF LANSDOWNE, PENNSYLVANIA, ASSIGNOR OF ONE-THIRD TO HENRY S. WILLIAMS AND ONE-THIRD TO MORRIS EARLE, BOTH OFPHILADELPHIA, PENNSYLVANIA.

VALVE FOB INTERNAL-COMBUSTION ENGINES.

Application filed 7 February To all whom it may concern:

Be it lyiown that I, Lonewrx JAN RUT- oen HOLST, a citizen of the UnitedStates, re-

siding at Lansdowne, in'the county of Delaware and State ofPennsylvania, have'invented certain new and useful Improvements inValves for Internal-Combustion Engines, of-which the following is aspecification.

To attain, the abovedefined ends, it is necessary that the valves bepositively driven; and that the beginning as well as the ending of theperiods of admission and exhaust be controlled by the'action of amovable port, with relation to fixed ports, so that one movable elementshall perform all the before-mentioned functions.

In the mechanical devices adapted to attain such results, use is made oftwo movable tubular members, concentric with each other and telescopingin each other, the outer member serving exclusively the purpose ofpreventing the second openin of either the suction or exhaust-portwithin the same cycle of operation of the engine.

For the better understanding of my present invention, reference is madeto the annexed drawings, in connection with the following description;in which dravfv'ing's Figure 1, is a view in elevation and cro' sssection through the cylinder and valvechest of an engine, fitted with mytubular valves as to main features thereof. Fig. 2,

is a view in elevation and transverse'sectiop on the line 22 of Fig. 3.Fig. 3, is a horizontal cross-sectional view on the'line 3-3 of Fig. 2'.Figs. 4, 5, 6 and 7, are diagrammatic sections, showing the relativepositions of the fixed ports and the movable ports atthe beginning ofeach of the four phases of onecycle of operation, and the correspondin p'tions of the cranks or eccentrics on t e ha f-tim'e shaft.

In the drawings, corresponding parts have been indicated by the samereference letters and numerals.

Referring nowlto the drawings, in Fi 1, the cylinder-casting 8, isprovided wit a Specification otfLetters Patent.

PatentedFeb. 4, 1913. 1a, 1912. Serial No. 677,382.

. port-opening 9, by means of which the interior space of the cylinderabove the piston 11, is in communication with an annular space limited bthe inner-wall .of the valvechest 10, and the outer surface of thetubular members 12 and-13. These tubular members 12 and 13, are adaptedto telescope in each other and to be reciprocated by means of mechanismhereinafter to be fully .described. The inner tubular member- 12, fitsaccurately in the upper-section 10, of the valve-chest'10, locatedimmediately above the cylinder port 9, for the purpose of separating thecombustion space in the cylinder from the exhaust-outlet 14, wheneverthe exhaust-ports 12", in the tubular member 12, do not register withthe cylinder-port 9. The inner,surfa ce of the tubular member 12, fitssnugly around the lower part of the hollow central guide-piece 15, whichitself 'is rigidly attached to the upper face 10*, f the valvechest. Theouter-diameter of (1c guide-piece 15, is somewhat reduced h9g1":- ningat a point'approximately in line with the lower edge of thecylinder-port 9, so that when the port-holes 12, register with the port9, a sufficiently large annular space inside the tubular member 12, isprovided for the prompt etllux of the exhaust gases toward theexhaust-opening 14.

The central guide-piece 15, is closed at the bottom, but its cylindricalwall is provided with a series of slots L5", reaching entirely around,save for the short bridge-pieces 15, retaining the bottom to the upperpart. yTheseslots lf)", form the stationary suctionports, and areconnected through the tubular upper-end 15, with the suction-manifold23, so that when the suction-ports 12", in the inner ubular member 12,register with the ports 15", the explosive mixture will be drawn intothe cylinder by way of the an n-ular opening in thevalve-chest 19, belowthe cylinder-port 9, provided, however, that at the samdtiine the outerannular member 13, is placed low enough notto cover the ports 12, cf theinner tubular member 12.

12 and 12, in the inner tubular member 12, is preferabl regulated so,that-at the same time that she exhaust-ports 12-, cease to register withthe cylinder-port 9, the suction-ports 12", come in register with thesucltion-ports 15", while the distance between The distance between thetwo sets of ports the cylinder-port 9, and the suctionports 15 isestablished with due regard to the travel of the tubular member 12, inorder that the ports 12, will not pass beyond the line of reduction inthe diameter of the central guide-piece 15, thereby preventing them fromacting also as exhaust-ports.

The lower end of the valve-chest 10, is

open and permits the outer tubular member 13, to freely pass through.The member 13, is operated bymeans of-the connector "17. driven byaneccentric disk or crank 18, on the halftime shaft 18. 'Theeccentricity of the crank 18, together. with its angle of advance overthe crank 18", and the length of the connector 17, and of the member 13,are

so inter-regulated that when he suction stroke begins, the upper. edge.or the member 13, is in line with, or slightly below, the lower edge ofthe ports 15", as, clearly shown in Fig. 5. During the suction strokethe crank 18, moves through an arc'of 90, disposed symmetrically withregard to the vertical center line of the valve-mechanism, consequentlythe upper edge of the member 13, will remainbelow the lower edge of theports 15?, during the entire suction stroke, thus preventing anyparticipation of the member 13, in the regulation of. the suctionperiod, which-- is determinedexclusivel the added height ofthe' ports 12 an which total height is equal to the movement of the inner member 12,when its driving eccentric 18*, moves from the drawn position of theeccentric 18",in Fig. 5, to a point 18, 90 farther, as dotted in Fig. 5,which point corresponds with the drawn position of the eccentric 18", inFig 6, representing the beginning of the compression stroke. During thisstroke the eccentric 18*, driving the member 12, asses through its upperdead-center, there y keeping all ports closed and the eccentric 18, nowdrives the member 13, upwardly, thereby completely over lapping thesuction-ports 15", and finally;

also covering the suction-ports 12", so thatwhen the explosion takesplace the various valve gear members will have assumed the relativepositions shown .in drawn lines in Fig. 7. This figure shows thatshortly after the beginning of the outward movement? of the piston 11,on the working stroke, the; member 13, will reach its uppermostposiproduct. The member 13, is sufficiently advanced in its downwardstroke, as shown in 4, to prevent any interference whatever with theexhaust period, and it will thus be seen that the inner member 12,alone, regulates the beginning and the ending of the As the timing ofthe suction and exhaust periods is thus produced by the passage of twosets of ports in the same movable member, across a set of immovableports, the

accuracy of the timing when once established, cannot be disturbed, notwo movable members partaking in this regulation.

In Fig. 2, is shown-the arrangement of the exhaust openings 14, in casethe present invention is applied, to engines with cylinders cast inmultiple-units.

The connecting rods 16 and 1?, respectively, operating the members 12and 13, engage the wrist-pins 12 and 13", arranged respectively to theright and to the leftof the center of their respective members. Tolubricate these members the following pro vision is made. The ring 24,contains an oilchamber 24", surrounding the outer face of the tubularmember 13. Oil is poured into this chamber through the holes 24, and aproperly fitting spring or packing 24 prevents the oil running out,downwardly. The interior of the member 13, carries an annular oil pocket13*, into which the oil enters through a number of holes 13, drilledaround the circumference thereof, The two tubular members 12 and. 13,travel for a while downwardly and upwardly at their minimum distanceduring which periods the spring fingers 12, fastened to the lower end ofthe inner member 12-, dip into the oil chamber 13*, and later smear theoil against the inner face of the member 13, when the two do not furthertravel, in unison; In such manner the requisite supply of lubricant isapplied to the telescopic members 12 and 13. The first mentioned memberis also provided with a series of small holes 12 through which a supplyof oil is finally brought to and distributed around its inner surface.Furthermore, these movable tubular members are kept in perfect workingorder by an eflicient system of watercooling.

The outer member 13, is surrounded by the' which extends all around thejacket 8, valvechest 10, while the inner member 12, is cooled partly bythe same jacket and partly by the jacket 15 formed between the twoconcentric walls of the upper part of the guide-piece 15. The coolingwater entering at the opening 15, is deflected clown- Ward by thebattles 15, as illustrated in Figs. 1 and 3, and passes through theopening 15 toward the cylinder-jacket. This insures the coolest water tocirculate in the jacket l, cooling the charge when drawn in, and alsocooling the exhaust-gases reducing thereby their velocity and the noiseof their escape. contributing greatly to the efficiency of the mufilerand the silence of the engine.

Having thus described the nature and objects of my invention and themanner in which the same is to be performed, what I claim new and desireto secure by Letters Patent is:----

l. in an internal combustion engine, a cylinder, a valve-chest ofcircular cross-section at one side of said cylinder and in communicationtherewith through a single port, said valve chest being provided with anexhaust opening communicating with an an 'mlar chamber formed betweenthe inner wall of said valve-chest and the outer Wall or a sleevc'likeguide piece, said guide-piece closed at its lower end, supportedconcentrically within said valve-chest, and said guiikvpiece having itsopen upper end con meted with the 1' uel supply pipe and. having in itsc lindrital wall near the closed lower end a series of slots forming'anannular suction opening.

2 In internal combustion engines, a cylinder-casting carrying avalve-chest of circular cross-Se lion and connected therewith by oneport-opening, said valve-chest rigidly summrting concentrically aguide-piece of circuh r crosssection closed at the bottom and leaving anannular space between the outer wall of said guide-piece and the innerwail of said Vz'ilvechest,"a pair of telescoping movable tubularmembers, the outer one being blind and fitting closely against the innerwall of said valvechest, the inner tubular movable,membcr having twosets of annular apcrti res, and said member fitting closely the out,rwvall of saidicentral guidepiecc, ihe ape tures of said movable innertubular niemlbfr being adapted to successsively register respectively,with the port in the cylirider-casting and with the annular apertures inthe central guide-piece.

3 in internal combustion engines, a cyl indcrcasting carrying aValve-chest of cir rular '1'o ;--sc(ti m and connected to said \'al'-:e--liest by oiie port-opening, said valve chest ha\ ing in its cylindricalWall an opening -"'..i::.e=:ting with the exhaust piping of the eugnur,said valvcwhcsi rigidly supporting a hollow guidopicce of circularcrosse ti n. ii guide-piece co ted at one end nith me if supply or meengine and posite end a numlaaviug near its close-l o t Illltllllii'rfitori in; one circular inleta pair ct telescoping mt *ahlc mem-.-"liljiifl, in rei in the annular W in i space formed by the inner wallof said valve-chest and the outer wall of said-guidepiece, the outer oneof said movable members being blind and the inner one of said movablemembers being provided with two sets of openings, so spaced that one setwill by the reciprocating movement of the inner member regulate thebeginning and the ending of the exhaust-period, and the other setregulate the beginning and the ending of the suctionperiod, thereciprocating movement of the outer telescoping member causing thesuction-openings in the inner telescoping member to be closed on theirsecond passage across the annular opening of the guide-piece within thesame cycle of operations of the engine.

t. In internal combustion engines, a cylinder-casting carrying aval.ve-chest oi circular cross section and connected therewith by oneport-opening, a concentric guidepiece of circular cross-section andclosed at the bottom, rigidly supported inside of said valve-seat and apair of reciprocating tele scoping members, one of said members beingprovided with two sets of ports spaced so that one set of said portswill cause the be ginning and ending of the exhaust period by thereciprocating movement imparted to said member and the second set ofports in said member causing the beginning and the ending of the suctionperiod by the continu mice of the reciprocating movement imparted tosaid member.

5. In internal combustion engines, the combination of a cylindricalvalve-chest with a cylindrical concentric guide-piece and twotelescoping tubular members movable in the space formed between theinner surface of the valve-chest and the outer surface of saidguide-piece, the outer teleseoping member arranged to project at alltimes in its travel below the lower edge of the inner telescopingmember, the inner surface of said projecting part of the outsidetelescoping member provided with an annular oil-chumber, radialperforations in which are adapted to register with a stationaryoil-chamber carried by the lower end of said valve-chest and springfingers connected with the inner telescoping member to dip into theoilchamber of the outer telescoping i member, substantially as and forthe pun poses described.

In Witness whereof, I have hereunto set in y signature in the presenceof the two subscribing wituesscs hereto.

LQDEWYK JAN RUTGER Witnesses THOMAS M. SMITH, llmnnu l MILLER.

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